Tuesday, November 1 is All Saints' Day, dedicated to the saints of the Church who have attained heaven. Not to be confused with All Souls' Day (which is dedicated to those who have died and not yet reached heaven), All Saints' Day is a Holy Day of Obligation in the Latin Rite of the Catholic Church. According to Catholic.com, the festival is also celebrated by Eastern Orthodox Churches, and some Protestant, Anglican, Lutheran, and Anglican churches, as well. It was started by Pope Boniface IV, who also established All Souls' Day. Click through our gallery to learn more about All Saints' Day, and to view photos of the celebration across cultures. (Getty)